Mike Patton is a genius... It is definitely the hardest music I've ever played.
One of the great bands we opened up for was Priest back in '89. That was really great because at that time we had never met them, never toured with them before. They were a big influence on Slayer, so to open up for them was really cool.
Every job has its downside. For example, being in a band the travel part of it - getting picked up from your house in a car, going to the airport, getting on a plane, going from the airplane to a van, then going from the van to a hotel.